Key, Chords and Modes drop downs ... 
If you click in a select box for key, chord or scale it displays correct notes and fingering.If you double click without moving the mouse cursor arrow, the textbox will become highlighted and then you can use the up and down arrows of the keyboard (the one you type on) to change key, chord and scale variations. Modes will only come into effect when clicked on and will use whatever key you select. When you use modes (scales)... the chord type select box is irrelevant. 
(although any modes setting in the display boxes is actually irrelevant when clicking on notes and finding chord names... if you click in some scale then remove a note or two, the chords you see will be based on that scale).

Building Triad Chords......

A triad’s type relies on both its third and its fifth; or, more specifically, the distance between these notes and the root note. Compare the four most common triad types using C as the root:

 ■ C Major
  Root: C
  M3: E
  P5: G

 ■ C Minor
  Root: C
  m3: E♭
  P5: G

 ■ C Diminished
  Root: C
  m3: E♭
  ♭5: G♭

 ■ C Augmented
  Root: C
  M3: E
  ♯5: G♯

             ○ Cmaj7: C - E - G - B (M3, P5, M7)
             ○ Cdom7: C - E - G - B♭ (M3, P5, m7)

             ○ Cmin7: C - E♭ - G - B♭ (m3, P5, m7)
             ○ Cm/M7: C - E♭ - G - B (m3, P5, M7)